Cita APA (7a ed.)

Holmes, R. M., & Holmes, S. T. (1992). Understanding Mass Murder: A Starting Point. Federal probation, 66(1), 53-61.

Cita Chicago Style (17a ed.)

Holmes, Ronald M., y Stephen T. Holmes. "Understanding Mass Murder: A Starting Point." Federal Probation 66, no. 1 (1992): 53-61.

Cita MLA (9a ed.)

Holmes, Ronald M., y Stephen T. Holmes. "Understanding Mass Murder: A Starting Point." Federal Probation, vol. 66, no. 1, 1992, pp. 53-61.